Statement ( S ) : Chordates have a tail extending posterior to the anus. It contains skeletal elements and muscles but lacks coelom and visceral organs. Reason ( R ) : In aquatic organisms, it acts as a balancing organ.

( S ) is correct but ( R ) is not correct.

Both ( S ) and ( R ) are correct and ( R ) is the correct explanation to ( S ) .

Both ( S ) and are correct but ( R ) is not the correct explanation to ( S ) .

( S ) is not correct but ( R ) is correct.

Statement (S) : The amphibian blood is composed of erythrocytes, leucocytes and thrombocytes. The thrombocytes help in haemostasis. Reason (R): The haemostasis regulates the body temperature in poikilotherms. Which of the following is true?

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true, but (R) is not the correct explanation of (A)

MEDIUM

TS EAMCET

IMPORTANT

Earn 100

75% studentsanswered this correctly

HARD

TS EAMCET

IMPORTANT

Match the following

	List - I		List - II
(a)	Each half of the lower jaw is formed by 6 bones	(i)	Aves
(b)	Lacrimal and Harderian glands appeared for the first time	(ii)	Reptiles
(c)	Presence of only right systemic arch	(iii)	Amphibians
(d)	Each half of the lower jaw is made of single bone	(iv)	Mammals

MEDIUM

TS EAMCET

IMPORTANT

Study the following and pick up the correct combinations.

S.No	Class	Unique character	Flourished in
I)	Amphibia	Buccopharyngeal respiration	Carbonferous period
II)	Reptilia	Jacobson organs	Mesozoic era
III)	Mammalia	Pinna	Coenozoic era
IV)	Pisces	Meninx primitiva	Cretaceous period